Biogas and separation plants

1
Biogas and separation plants

• Project Manager Lars Baadstorp

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DDHC - The company

• DDHC Private share holding company daughter
  company to Schouw Co and Hedeselskabet
• Turn key supplier of biogas and separation plants
• Cooperation with NRGE so secure the Irish
  solution
• Large scale animal producers and joint plants
• Industrial plants (abattoirs, oil industry etc.)
• Waste management plants (waste household and
  restaurant waste)

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DDHC the experience

• The company
• Experience 22 farm biogas plants
• 8 star plants (more farms connected to one
  plant through pipelines)
• 1 industrial biogas plant
• 2 separation plants
• Market Up to now mainly domestic
• Ireland is a prioritised market

4
DDHC the experience

• The staff
• In total approx. 50 employed
• Typical experience 10-20 years
• Planning and implementing of most of the 20
  centralised plants in Denmark
• Treatment of almost all kind of organic
  residuals incl. household waste
• Planning of biogas in Europe, Asia and USA

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The challenge of animal production in Europe

• To be maintain producing of animals and meet
  rising environmental demands
• or even to be allowed to stay in business
• Growing environmental pressure
• Loss of nutrients, odour and expanded transport
  will not be accepted
• Better hygienic standards and energy balance
  will be demanded

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and what is the problem?

• Often a bad handling of nutrients nutrients
  are handles as when farms had three cows and
  two pigs
• Manure is in many places regarded as waste and
  not a resource
• Growing amount of nutrients from agricultural
  industries
• Environment is an issue for most consumers

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Biogas a mean to re-establish the organic cycle

• The present situation

Energy
Fertiliser
Energy
Energy
Agriculture
Industry
Households
Manure
Waste
Waste
Environmental problem
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Biogas a mean to re-establish the organic
cycle

• The future after implementation of biogas
• Fertiliser Energy

Households
Industry
Agriculture
Biogas
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and what can be done?

• Digestion Homogenise the manure
• Change organic N into free n
• Take away odour
• Sanitation (up front/in process)
• Decanter separation Split N and P in two
  fractions
• Liquid fertiliser with optimal N/P ratio
• Efficiency on N close to 100
• Very easy to handle
• Fibre fraction that can be exported
• Evaporator Split nutrients an water
• Easy transport and distribution
• all well tested and documented technologies

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The optimal technology experience

• The simple plant
• Thermophilic digestion
• Utilise the economy of scale
• Optimise yield through high quality feeding
• Prepare feeding through sanitation/homogenisation
  
• High quality gas for operation of CHP
• Separation only on the digestate

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The modular build plant

• The modules
• Pre-treatment of biomass Sanitation and
  homogenisation
• Biogas plant including intake facilities,
  digester and gas system.
• CHP unit for utilising the gas
• Separation units Decanter separation
  (liquid/solid)
• Evaporator (concentrate/clean water)

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The Economy of Biogas

• Biogas Energy (electricity for own
  consumption and for sale)
• Gate fees
• Cheaper manure handling
• Savings in purchase of fertiliser
• Decanter separation
• Savings in purchase of fertilisers/Sales of
  manufactured fertilisers
• Evaporation Savings in transport of surplus
  nutrients

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Benefits

• Simple economical benefits
• Income from energy, gate fees, higher
  fertiliser value and cheaper manure
  handling
• Non-economical benefits
• CO2 neutral energy
• Reduced CH4 emission
• Reduced odour
• Reduced outlets of nutrients
• . Create a background to maintain/expand animal
  production

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The biogas plant


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The Biogas Plant


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Cogeneration unit


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Decanter separation

• Decanter separation
• 8-10 solid material
• 80-85 of the Phospor and organic nitrogen
• 30 - 35 TS
• 90-92 liquid fertiliser
• Allmost all ammonia
• Utilisation equal to chemical fertiliser

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Hegndal Farm Biogas Plant

• Fibre fraction
• A compost product
• High phosphorus value
• Sanitised (free of bacterium, virus and seeds)
• Can be pelletisied (dryer, pelletiser)
• Can be composted (reduce amount, higher TS)

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Separation - evaporator
Evaporator Separates nutrients from water. Water
fraction Allmost clean waster (nutrients equal
to drinking water quality, contains orgaic
material) Nutrient fraction Concentrated liquid
fertiliser


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The future manure handling

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Implementing from idea to reality

• Planning Fast, action minded paper
• Actual figures on the inputs
• Standard data on production, investment
  and operation
• Planning application/EPA licence
• Mature the project Agreements on input/output
• Financial close
• Basic/Detailed design Optimise the plant
• Construction Ends with a full commissioned and
  optimised plant